Your cart is empty
Browse our catalog to find the parts you need.
These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.

International Fluid Power · Hydraulics
P51
In stock · ships from Knoxville
This is a P51 series heavy-duty hydraulic gear pump designed for demanding mobile applications like dump trucks, refuse equipment, and utility trucks.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 3 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Other applications
Other applications
This is a generic P51 series pump commonly used on various vocational and heavy-duty truck applications. It requires a direct mount with a 4-inch pilot and a 7/8-inch 13-tooth splined shaft. Always verify shaft size, rotation, and mounting flange before replacement.
Part data verified against 4 catalog sources
Numbers this part supersedes or interchanges with. Showing 6 of 6.
Different year, make, or config? Get a confirmation against your truck in under a minute.
It converts mechanical power from a PTO or direct engine mount into hydraulic flow to operate cylinders and other equipment. The pump is bi-rotational and features ports on both the sides and rear for flexible plumbing. You typically replace this pump when you experience a loss of hydraulic power, slow cylinder movement, or excessive noise indicating internal wear or gear failure.
Part Number: P51
HYD. PUMP P51
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more